Machine cooling apparatus



Dec. 17, 1935. w DOYLE AL 2,024,209

MACHINE COOLING APPARATUS Filed Oct. 8, 1934 4 Sheets-Sheet 1 INVENTORS W. L. H. Dag)? 5.61 MsZ/lk De c. 17, 1935. w DOYLE 1- AL 2,024,209

MACHINE COOLING APPARATUS Filed 001'" 8, 1934 INVENTORS WL 11 Day/e 4 Sheets-Sheet 2 4 Sheets-Sheet s NTORS M pa && Me/ll/z NVE L.

l V m Dec. 17, 1935. w. L. H. DOYLE ET AL .MACHINE COOLING APPARATUS Filed 061;. 8, 1934 Dec. 17, 1935.

w. 1.. H. DOYLE ET AL #324,209 MACHINE COOLING APPARATUS Filed Oct. 8, .1954

4 Sheets-Sheet 4 Patented Dec. 17, 1935 UNITED STATES PATENT OFFICE MACHINE COOLING APPARATUS Delaware Application October 8, 1934, Serial No. 747,480

14 Claims.

This invention relates generally to cooling apparatus for machines such as internal combustion engines especially of the Diesel type, air compressors or other apparatus employing a closed liquid cooling circuit and. relates more particularly to an improved combination of surge tank and cooler for the cooling water.

Our invention is particularly applicable to thoye cooling systems wherein soft water is circulated in a closed circuit through both the water jackets of a machine and a heat exchanger, the heat exchanger being cooled by raw Water. Various devices and structures and combination arrangements thereof have been heretofore proposed for cooling the soft water and taking care of surge and make-up conditions incident to the cooling system, but such devices have been either expensive, complicated to build or require an excessive amount of floor space.

It is one object of our invention to provide a relatively simple, compact and efficient arrangement that can be built at a minimum cost. In certain specific aspects of the invention, I have accomplished the foregoing object by providing an improved combination of a surge tank in a water cooler vertically arranged so that it functions not only as a cooler but also as a standard for supporting at its upper end the surge tank while relatively simple means of communication between the surge tank and cooler is provided. I preferably dispose the vertical cooler and tank in substantially coaxial relation with suitable ports or openings extending either laterally or axially of the cooler shell to allow communication between the surge tank and cooler in a relatively simple but highly effective manner.

Other objects have to do with providing an improved combination of surge tank and cooler so arranged as to permit a tube bundle to be efiectively supported in the cooler while at the same time permitting expansion of the tubes to be properly taken care of. A further object is to provide an improved arrangement whereby the cooler may further function as a supporting column of a storage space for either mechanical equipment such as tools or other apparatus to be used in an engine room, or fuel oil, or both; A still further object is to provide in our improved combination a cooler for engine lubricating oil and to have the oil cooler so arranged with the other elements that a highly compact, simple and cooperating arrangement is provided to insure minimum floor space, economical manufacture and ease of accessibility.

Other objects and advantages will 1?? more apparent to those skilled in the art from the following description of the accompanying drawings in which:

Fig. 1 is a front elevation of one form of the invention; 5

practice, we have provided in Figs. 1 and 2 a ver- 15v 'tical shell or casing I made of any suitable sheet or plate metal and preferably of cylindrical form. This shell is supported on a base 2 which preferably is disposed at a floor level 3. Supported by the upper end of the shell I is a surge chamber 4 having a bottom 5 and sides 6. The chamber 4 communicates directly through axial opening 1 with the interior of the shell. Disposed within shell I is any suitable type of water cooler generally indicated at 8, this cooler being shown preferably of the bundle tube type whose lower tube sheet 9 also functions as one wall of a header to close the lower end of shell I. The upper header lila is of the floating type but is laterally supported by a flange which is carried by a baflle supporting and flow guiding wall 8a. Said flange has slidable connection with shell I-to permit ease of assembly and expansion and contraction of the various members during heating or cooling thereof. It will be understood that wall 8a is held in supporting relation to the tube nest to form a unit therewith, this supporting connection being effected by a series of staggered horizontal bafiles 8b between the wall 80, and the series of tubes thereby supporting the tubes with respect to said wall and also insuring flow of water transversely around the outside of the tubes.

Any suitable pumping mechanism (not shown) circulates raw water upwardly through a pipe l3 and chamber l4, thence upwardly through one portion of the tubes and downwardly through the remaining portion thereof to communicate with a chamber [5 from which the raw water discharges through an outlet [6. The chambers I l and [5 are separated by a partition l1. It will of course be understood that the engine is cooled by soft water so as to prevent formation of scale and sediment within the cylinder jackets. This soft water is circulated from the engine through an inlet [9 to surge chamber 4 from which it flows downwardly through opening 1 and around cooler 8 and thence outwardly through an outlet 20 and back to the engine.

The structure which forms chambers l4 and 5 is supported preferably upon a combined lubricant tank and cooler generally indicated at 2|, the tank 22 being disposed horizontally with a cooler 23 supported within a flow passage 24. A series of staggered bafiles 23a are provided to insure fiow transversely of the tubes. A tube sheet 25 of cooler 23 also functions as a head to close the end of tank 22. The cooler communicates with an inflowing chamber 26 and an outflowing chamber 21. The raw cooling water enters chamber 26 from a pump discharge pipe 28, flows through one-half of the tubes of cooler 23 and thence back through the remaining tubes to chamber 2'! and thence through pipe I3 and the other cooler as previously described.

In order to provide a simplified structure for forming'the surge chamber 4 and also an annular fuel tank 30, plate or sheet metal sides 3| extend upwardly to form the walls of both the surge and fuel oil chambers, the intermediate portion of the walls 3| being secured to a bottom 32 for the fuel tank which projects radially from the cooler casing I. Fuel oil inlet and outlet pipes 33 and 34 are also provided. Mechanical storage space is provided immediately below the fuel oil tanks by a series of shelves 35 and 36 while doors 3'! may be suit-ably hinged to form a smooth continuation of the outermost wall 3|. Tools or other accessories may be placed on the shelves for ready access.

It will be observed from the foregoing disclo sure that the cooler shell I and surge tank 4 are arranged for functional and structural cooperation whereby a thermally efficient cooler is obtained with a comparatively simple and inexpensive structural arrangement. Also in the form shown in Figs. 1 and 2 the vertical cooler casing is arranged to perform the additional function of forming the inner wall of the fuel oil tank and a compartment wall for mechanical storage purposes such as tools and the like, this being in combination with the further feature of having the lubricant cooler supporting the entire structure in a most compact and yet efficient and economical manner. I

In the modification shown in Fig. 3 the cooler has an outer shell 31 preferably cylindrical in cross-section. A surge tank generally indicated at. 38 is supported on the shell at a point below the uppermost end 39 thereof, thus permitting lateral openings 40 formed directly in the shell to allow communication between the surge tank 38 and the interior of the cooler. The cooler tubes 4| have a lower tube sheet 42 held in fixed relation to the lower end of shell 31 so as to close the same. The upper header 43 is a chamber, one wall of which is a tube sheet in which the tubes are secured. The walls of header 43 are slidably supported in the upper end of the shell to take care of the expansion or contraction during heating and cooling. Soft water flows from the engine through an inlet 44 to surge tank 38 and then inwardly through openings 40 and around the cooler tubes 4| and out through outlet 45 back to the engine cylinder jackets. A series of staggered baflies 4|a are arranged between the tubes and between the tubes and wall 37 to insure flow transversely of the tubes.

In order to supply raw water to the cooler tubes 4| and also to the lubricant cooler 46 while at the same time maintaining a compact relation between the same, we have arranged the cooler 46 in a vertical position as a supporting base for the cooler 4| and surge tank 38, and have provided an intermediate water distributing compartment 3 interposed between the two coolers. This distributing means includes an inlet 49 communicating with a chamber 50 to direct raw water downwardly through one portion of the tubes 46 and then upwardly through the other portion thereof to a chamber 5|, thence upwardly and downwardly through the tubes 4| to a chamber 52 and outlet 53. The lubricating oil enters inlet 54 as discharged through outlet 55, a series of staggered baflies 46a being provided to insure flow transversely of the tubes.

From the foregoing disclosure of Fig. 3 it is seen that the same compact and comparatively inexpensive arrangement of cooler and surge tank is obtained by utilizing the same functional and structural cooperation between the elements as is done in Figs. 1 and 2.

The modification shown in Fig. 4 utilizes certain features of Figs. 1 and 2 except that a wall is not provided around the vertical cooler as is done in Figs. 1 and 2 to obtain the fuel oil tanks and mechanical storage space. Also in Fig. 4 the vertical cooler is supported directly on a base 43 which is similar to base 48 of Fig. 3 except that the lubricant cooler is arranged in a horizontal position for connection to chambers 50' and 5| corresponding to chambers 50 and 5|, Fig. 3. The inlet and outlet of the lubricant cooler 46 are located on the top thereof at 54' and 55. An inlet and outlet for raw water are located at 49 and 53 respectively. The parts of the vertical cooler and surge tank in Fig. 4 which correspond to similar parts in Fig. 2 are given the same reference numbers thereof but are primed, and hence fur ther description of Fig. 4 is not necessary.

In the modification shown in Fig. 5 the cooler is disposed in a vertical position and supports a surge tank 6| at its upper end in the same simplified manner as shown in the other forms. However, instead of having the bottom 62 of the surge tank disposed beneath the uppermost end 1 of the cooler casing 53 as in Fig. 3, we have provided a relatively simple pipe connection 64 extending in elbow form from lateral ports in the side 63 upwardly through bottom 62 for communication with the surge tank. A suitable closure 65 is disposed within the surge tank and encloses the upper end of the cooler with an air chamber. Air holes or tell-tale holes 65' permit drainage of any raw water that may leak from the upper end of the cooler, thus avoiding contamination of the soft water by the raw water. As is shown in Fig. 6 the cooler tubes are supported in a. tub sheet 66 which has a suitable packing 61 for operation with the casing 63 and its dome 68. The packed connection permits sliding movement of the upper free end of the cooler tubes during expansion and contraction thereof while at the same time preventing leakage of raw water into the soft water.

It is thus seen that in the modification shown in Fig. 5 there is provided a self-sustaining combined surge tank and cooler so arranged as to require only minimum floor space, maintain a high degree of efliciency between the surge tank and cooler, and insure minimum cost of construction and maintenance.

The term engine whenever used herein refers equally as well to compressors or other machines as previously mentioned.

It will of course be understood that various changes in details of construction and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as set forth in the appended claims.

We claim:

1. Machine cooling apparatus comprising, in combination, a vertical cooler shell, cooling means disposed therein, and a surge tank supported on said shell at its upper end and having communication therewith.

2. Machine cooling 'apparatus comprising, in combination, a vertical cooler shell having an open upper end, cooling means disposed in said shell, and a surge tank supported on the upper end of said shell and having an opening through its bottom directly communicating with said shell.

3. Machine cooling apparatus comprising, in combination, a vertical cooler shell, cooler tubes disposed therein, a surge tank supported on said shell at its upper end and having communication therewith, and a base for supporting said cooler shell and distributing water through said cooler tubes.

4. Machine cooling apparatus comprising, in combination, a vertical cooler shell, cooler tubes disposed therein, a surge tank supported on said shell at its upper end and having communication therewith, a base for supporting said cooler shell and distributing water through said cooler tubes, and a lubricant cooler associated with said base.

5. Machine cooling apparatus comprising, in combination, a vertical cooler shell cooling means disposed therein, a surge tank supported on said shell at its upper end and overhanging the walls thereof, and means providing communication between said tank and shell.

6. The combination set forth in claim 1 further characterized in that said surge tank overhangs the walls of the cooler casing, and walls are provided extending downwardly from the overhanging portion of the surge tank and in spaced relation to the cooler casing to form a storage compartment.

7. The combination set forth in claim 1 further characterized in that the surge tank overhangs the wall of the cooler casing and the side walls of said surge tank continue downwardly to surround the cooler casing in spaced relation thereto to form storage compartments, said continued side walls having a door opening therein.

8. Machine cooling apparatus comprising, in combination, a vertical shell, cooling means dis posed therein, a surge tank supported on the upper end of said shell, and means including lateral openings in the wall of said shell for allowing 5 communication with said surge tank.

9. Machine cooling apparatus comprising, in combination, a vertical cooler shell, cooling means disposed therein, and a surge tank supported on the upper end of said shell and having lateral 10 ports opening directly into the surge tank to allow communication between the cooler shell and surge tank.

10. Machine cooling apparatus comprising, in combination, a vertical shell, cooling means disl5 posed therein, a surge tank supported on the upper end of said shell and having a bottom, said shell having lateral openings, and elbow pipes extending from said lateral openings for communication through the bottom of said surge tank.

11'. Machine cooling apparatus comprising, in combination, a vertical cooler shell, cooling means disposed therein, a surge tank supported on the upper end of said shell and having communication therewith, and an oil cooler forming a base upon which said cooler shell is supported.

12. Machine cooling apparatus comprising, in combination, a vertical cooler shell, cooling means disposed therein, a surge tank supported on said shell at its upper end and having communication therewith, and a horizontal oil tank having a cooler therein and forming a base upon which said cooler shell is supported.

13. The combination set forth in claim 1 further characterized in that said cooling means has a tube sheet held in fixed relation to the lower end of said cooler shell and arranged to close the same, and the upper portion of said cooling means beingfreely disposed in the upper end of said shell.

14. The combination set forth in claim 1 further characterized in that the lower end of said cooling means has a tube sheet held in fixed relation to the lower end of said cooler shell and arranged to close the same, and the upper end of said cooling means having provision for being slidably supported by the upper portion of the wall of said shell.

WILLIAM L. H. DOYLE.

BROR G. MELLIN. 

